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Code Issues 19.0k Packages Projects Releases 20 Wiki Activity

Some Unicode characters cause a mismatch between the cursor position and the displayed width #15880

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opened 2026-01-31 04:51:12 +00:00 by claunia · 3 comments
claunia commented 2026-01-31 04:51:12 +00:00
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Originally created by @magiblot on GitHub (Nov 13, 2021).

Windows Terminal version (or Windows build number)

10.0.19043.1348

Other Software

No response

Steps to reproduce

First, make sure you are not using the legacy console.

Then compile and run the following program in a console:

#include <windows.h>
#include <string.h>

inline void print(const char *s)
{
    WriteConsole(GetStdHandle(STD_OUTPUT_HANDLE), s, strlen(s), 0, 0);
}

int main()
{
    UINT icp = GetConsoleCP();
    UINT ocp = GetConsoleOutputCP();
    SetConsoleCP(65001);
    SetConsoleOutputCP(65001);

    print("123456789\n");
    print("<𐌀>");
    print("<𐌁>");
    print("|\n");
    print("<𐌀𐌁>");
    print("|\n");

    SetConsoleOutputCP(ocp);
    SetConsoleCP(icp);
    return 0;
}

Expected Behavior

The program should output either of the following:

  1. If 𐌀 and 𐌁 are considered to be single-width: 
    123456789
<𐌀><𐌁>|
<𐌀𐌁>|
  2. If 𐌀 and 𐌁 are considered to be double-width: 
    123456789
<𐌀 ><𐌁 >|
<𐌀 𐌁 >|

Actual Behavior

The program had the following output:

123456789
<𐌀> <𐌁> |
<𐌀𐌁>  |

As you can see, after every WriteConsole operation the cursor is moved as if the affected characters were double-width, but they don't look like so.

This issue affects at least the following Unicode characters (from this page):

Old Italic
    𐌀 𐌁 𐌂 𐌃 𐌄 𐌅 𐌆 𐌇 𐌈 𐌉 𐌊 𐌋 𐌌 𐌍 𐌎 𐌏 𐌐 𐌑 𐌒 𐌓 𐌔 𐌕 𐌖 𐌗 𐌘 𐌙 𐌚 𐌛 𐌜 𐌝 𐌞 𐌠 𐌡 𐌢 𐌣 
Gothic
    𐌰 𐌱 𐌲 𐌳 𐌴 𐌵 𐌶 𐌷 𐌸 𐌹 𐌺 𐌻 𐌼 𐌽 𐌾 𐌿 𐍀 𐍁 𐍂 𐍃 𐍄 𐍅 𐍆 𐍇 𐍈 𐍉 𐍊 
Deseret
    𐐀 𐐁 𐐂 𐐃 𐐄 𐐅 𐐆 𐐇 𐐈 𐐉 𐐊 𐐋 𐐌 𐐍 𐐎 𐐏 𐐐 𐐑 𐐒 𐐓 𐐔 𐐕 𐐖 𐐗 𐐘 𐐙 𐐚 𐐛 𐐜 𐐝 𐐞 𐐟 𐐠 𐐡 𐐢 𐐣 𐐤 𐐥 𐐨 𐐩 𐐪 𐐫 𐐬 𐐭 𐐮 𐐯 𐐰 𐐱 𐐲 𐐳 𐐴 𐐵 𐐶 𐐷 𐐸 𐐹 𐐺 𐐻 𐐼 𐐽 𐐾 𐐿 𐑀 𐑁 𐑂 𐑃 𐑄 𐑅 𐑆 𐑇 𐑈 𐑉 𐑊 𐑋 𐑌 𐑍 
Byzantine Musical Symbols
    𝀀 𝀁 𝀂 𝀃 𝀄 𝀅 𝀆 𝀇 𝀈 𝀉 𝀊 𝀋 𝀌 𝀍 𝀎 𝀏 𝀐 𝀑 𝀒 𝀓 𝀔 𝀕 𝀖 𝀗 𝀘 𝀙 𝀚 𝀛 𝀜 𝀝 𝀞 𝀟 𝀠 𝀡 𝀢 𝀣 𝀤 𝀥 𝀦 𝀧 𝀨 𝀩 𝀪 𝀫 𝀬 𝀭 𝀮 𝀯 𝀰 𝀱 𝀲 𝀳 𝀴 𝀵 𝀶 𝀷 𝀸 𝀹 𝀺 𝀻 𝀼 𝀽 𝀾 𝀿 𝁀 𝁁 𝁂 𝁃 𝁄 𝁅 𝁆 𝁇 𝁈 𝁉 𝁊 𝁋 𝁌 𝁍 𝁎 𝁏 𝁐 𝁑 𝁒 𝁓 𝁔 𝁕 𝁖 𝁗 𝁘 𝁙 𝁚 𝁛 𝁜 𝁝 𝁞 𝁟 𝁠 𝁡 𝁢 𝁣 𝁤 𝁥 𝁦 𝁧 𝁨 𝁩 𝁪 𝁫 𝁬 𝁭 𝁮 𝁯 𝁰 𝁱 𝁲 𝁳 𝁴 𝁵 𝁶 𝁷 𝁸 𝁹 𝁺 𝁻 𝁼 𝁽 𝁾 𝁿 ... 
Musical Symbols
    𝄀 𝄁 𝄂 𝄃 𝄄 𝄅 𝄆 𝄇 𝄈 𝄉 𝄊 𝄋 𝄌 𝄍 𝄎 𝄏 𝄐 𝄑 𝄒 𝄓 𝄔 𝄕 𝄖 𝄗 𝄘 𝄙 𝄚 𝄛 𝄜 𝄝 𝄞 𝄟 𝄠 𝄡 𝄢 𝄣 𝄤 𝄥 𝄦 𝄪 𝄫 𝄬 𝄭 𝄮 𝄯 𝄰 𝄱 𝄲 𝄳 𝄴 𝄵 𝄶 𝄷 𝄸 𝄹 𝄺 𝄻 𝄼 𝄽 𝄾 𝄿 𝅀 𝅁 𝅂 𝅃 𝅄 𝅅 𝅆 𝅇 𝅈 𝅉 ���� 𝅋 𝅌 𝅍 𝅎 𝅏 𝅐 𝅑 𝅒 𝅓 𝅔 𝅕 𝅖 𝅗 𝅘 𝅙 𝅚 𝅛 𝅜 𝅝 𝅗𝅥 𝅘𝅥 𝅘𝅥𝅮 𝅘𝅥𝅯 𝅘𝅥𝅰 𝅘𝅥𝅱 𝅘𝅥𝅲 𝅥 𝅦 𝅧 𝅨 𝅩 𝅪 𝅫 𝅬 𝅭 𝅮 𝅯 𝅰 𝅱 𝅲 𝅳 𝅴 𝅵 𝅶 𝅷 𝅸 𝅹 𝅺 𝅻 𝅼 𝅽 𝅾 𝅿 𝆀 𝆁 𝆂 ... 
Mathematical Alphanumeric Symbols
    𝐀 𝐁 𝐂 𝐃 𝐄 𝐅 𝐆 𝐇 𝐈 𝐉 𝐊 𝐋 𝐌 𝐍 𝐎 𝐏 𝐐 𝐑 𝐒 𝐓 𝐔 𝐕 𝐖 𝐗 𝐘 𝐙 𝐚 𝐛 𝐜 𝐝 𝐞 𝐟 𝐠 𝐡 𝐢 𝐣 𝐤 𝐥 𝐦 𝐧 𝐨 𝐩 𝐪 𝐫 𝐬 𝐭 𝐮 𝐯 𝐰 𝐱 𝐲 𝐳 𝐴 𝐵 𝐶 𝐷 𝐸 𝐹 𝐺 𝐻 𝐼 𝐽 𝐾 𝐿 𝑀 𝑁 𝑂 𝑃 𝑄 𝑅 𝑆 𝑇 𝑈 𝑉 𝑊 𝑋 𝑌 𝑍 𝑎 𝑏 𝑐 𝑑 𝑒 𝑓 𝑔 𝑖 𝑗 𝑘 𝑙 𝑚 𝑛 𝑜 𝑝 𝑞 𝑟 𝑠 𝑡 𝑢 𝑣 𝑤 𝑥 𝑦 𝑧 𝑨 𝑩 𝑪 𝑫 𝑬 𝑭 𝑮 𝑯 𝑰 𝑱 𝑲 𝑳 𝑴 𝑵 𝑶 𝑷 𝑸 𝑹 𝑺 𝑻 𝑼 𝑽 𝑾 𝑿 𝒀 ... 
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Originally created by @magiblot on GitHub (Nov 13, 2021). ### Windows Terminal version (or Windows build number) 10.0.19043.1348 ### Other Software _No response_ ### Steps to reproduce First, make sure you are *not* using the legacy console. Then compile and run the following program in a console: ```c++ #include <windows.h> #include <string.h> inline void print(const char *s) { WriteConsole(GetStdHandle(STD_OUTPUT_HANDLE), s, strlen(s), 0, 0); } int main() { UINT icp = GetConsoleCP(); UINT ocp = GetConsoleOutputCP(); SetConsoleCP(65001); SetConsoleOutputCP(65001); print("123456789\n"); print("<𐌀>"); print("<𐌁>"); print("|\n"); print("<𐌀𐌁>"); print("|\n"); SetConsoleOutputCP(ocp); SetConsoleCP(icp); return 0; } ``` ### Expected Behavior The program should output either of the following: 1. If `𐌀` and `𐌁` are considered to be single-width: ``` 123456789 <𐌀><𐌁>| <𐌀𐌁>| ``` 2. If `𐌀` and `𐌁` are considered to be double-width: ``` 123456789 <𐌀 ><𐌁 >| <𐌀 𐌁 >| ``` ### Actual Behavior The program had the following output: ``` 123456789 <𐌀> <𐌁> | <𐌀𐌁> | ``` As you can see, after every `WriteConsole` operation the cursor is moved as if the affected characters were double-width, but they don't look like so. This issue affects at least the following Unicode characters (from [this page](https://www.cogsci.ed.ac.uk/~richard/unicode-sample-3-2.html)): ``` Old Italic 𐌀 𐌁 𐌂 𐌃 𐌄 𐌅 𐌆 𐌇 𐌈 𐌉 𐌊 𐌋 𐌌 𐌍 𐌎 𐌏 𐌐 𐌑 𐌒 𐌓 𐌔 𐌕 𐌖 𐌗 𐌘 𐌙 𐌚 𐌛 𐌜 𐌝 𐌞 𐌠 𐌡 𐌢 𐌣 Gothic 𐌰 𐌱 𐌲 𐌳 𐌴 𐌵 𐌶 𐌷 𐌸 𐌹 𐌺 𐌻 𐌼 𐌽 𐌾 𐌿 𐍀 𐍁 𐍂 𐍃 𐍄 𐍅 𐍆 𐍇 𐍈 𐍉 𐍊 Deseret 𐐀 𐐁 𐐂 𐐃 𐐄 𐐅 𐐆 𐐇 𐐈 𐐉 𐐊 𐐋 𐐌 𐐍 𐐎 𐐏 𐐐 𐐑 𐐒 𐐓 𐐔 𐐕 𐐖 𐐗 𐐘 𐐙 𐐚 𐐛 𐐜 𐐝 𐐞 𐐟 𐐠 𐐡 𐐢 𐐣 𐐤 𐐥 𐐨 𐐩 𐐪 𐐫 𐐬 𐐭 𐐮 𐐯 𐐰 𐐱 𐐲 𐐳 𐐴 𐐵 𐐶 𐐷 𐐸 𐐹 𐐺 𐐻 𐐼 𐐽 𐐾 𐐿 𐑀 𐑁 𐑂 𐑃 𐑄 𐑅 𐑆 𐑇 𐑈 𐑉 𐑊 𐑋 𐑌 𐑍 Byzantine Musical Symbols 𝀀 𝀁 𝀂 𝀃 𝀄 𝀅 𝀆 𝀇 𝀈 𝀉 𝀊 𝀋 𝀌 𝀍 𝀎 𝀏 𝀐 𝀑 𝀒 𝀓 𝀔 𝀕 𝀖 𝀗 𝀘 𝀙 𝀚 𝀛 𝀜 𝀝 𝀞 𝀟 𝀠 𝀡 𝀢 𝀣 𝀤 𝀥 𝀦 𝀧 𝀨 𝀩 𝀪 𝀫 𝀬 𝀭 𝀮 𝀯 𝀰 𝀱 𝀲 𝀳 𝀴 𝀵 𝀶 𝀷 𝀸 𝀹 𝀺 𝀻 𝀼 𝀽 𝀾 𝀿 𝁀 𝁁 𝁂 𝁃 𝁄 𝁅 𝁆 𝁇 𝁈 𝁉 𝁊 𝁋 𝁌 𝁍 𝁎 𝁏 𝁐 𝁑 𝁒 𝁓 𝁔 𝁕 𝁖 𝁗 𝁘 𝁙 𝁚 𝁛 𝁜 𝁝 𝁞 𝁟 𝁠 𝁡 𝁢 𝁣 𝁤 𝁥 𝁦 𝁧 𝁨 𝁩 𝁪 𝁫 𝁬 𝁭 𝁮 𝁯 𝁰 𝁱 𝁲 𝁳 𝁴 𝁵 𝁶 𝁷 𝁸 𝁹 𝁺 𝁻 𝁼 𝁽 𝁾 𝁿 ... Musical Symbols 𝄀 𝄁 𝄂 𝄃 𝄄 𝄅 𝄆 𝄇 𝄈 𝄉 𝄊 𝄋 𝄌 𝄍 𝄎 𝄏 𝄐 𝄑 𝄒 𝄓 𝄔 𝄕 𝄖 𝄗 𝄘 𝄙 𝄚 𝄛 𝄜 𝄝 𝄞 𝄟 𝄠 𝄡 𝄢 𝄣 𝄤 𝄥 𝄦 𝄪 𝄫 𝄬 𝄭 𝄮 𝄯 𝄰 𝄱 𝄲 𝄳 𝄴 𝄵 𝄶 𝄷 𝄸 𝄹 𝄺 𝄻 𝄼 𝄽 𝄾 𝄿 𝅀 𝅁 𝅂 𝅃 𝅄 𝅅 𝅆 𝅇 𝅈 𝅉 ���� 𝅋 𝅌 𝅍 𝅎 𝅏 𝅐 𝅑 𝅒 𝅓 𝅔 𝅕 𝅖 𝅗 𝅘 𝅙 𝅚 𝅛 𝅜 𝅝 𝅗𝅥 𝅘𝅥 𝅘𝅥𝅮 𝅘𝅥𝅯 𝅘𝅥𝅰 𝅘𝅥𝅱 𝅘𝅥𝅲 𝅥 𝅦 𝅧 𝅨 𝅩 𝅪 𝅫 𝅬 𝅭 𝅮 𝅯 𝅰 𝅱 𝅲 𝅳 𝅴 𝅵 𝅶 𝅷 𝅸 𝅹 𝅺 𝅻 𝅼 𝅽 𝅾 𝅿 𝆀 𝆁 𝆂 ... Mathematical Alphanumeric Symbols 𝐀 𝐁 𝐂 𝐃 𝐄 𝐅 𝐆 𝐇 𝐈 𝐉 𝐊 𝐋 𝐌 𝐍 𝐎 𝐏 𝐐 𝐑 𝐒 𝐓 𝐔 𝐕 𝐖 𝐗 𝐘 𝐙 𝐚 𝐛 𝐜 𝐝 𝐞 𝐟 𝐠 𝐡 𝐢 𝐣 𝐤 𝐥 𝐦 𝐧 𝐨 𝐩 𝐪 𝐫 𝐬 𝐭 𝐮 𝐯 𝐰 𝐱 𝐲 𝐳 𝐴 𝐵 𝐶 𝐷 𝐸 𝐹 𝐺 𝐻 𝐼 𝐽 𝐾 𝐿 𝑀 𝑁 𝑂 𝑃 𝑄 𝑅 𝑆 𝑇 𝑈 𝑉 𝑊 𝑋 𝑌 𝑍 𝑎 𝑏 𝑐 𝑑 𝑒 𝑓 𝑔 𝑖 𝑗 𝑘 𝑙 𝑚 𝑛 𝑜 𝑝 𝑞 𝑟 𝑠 𝑡 𝑢 𝑣 𝑤 𝑥 𝑦 𝑧 𝑨 𝑩 𝑪 𝑫 𝑬 𝑭 𝑮 𝑯 𝑰 𝑱 𝑲 𝑳 𝑴 𝑵 𝑶 𝑷 𝑸 𝑹 𝑺 𝑻 𝑼 𝑽 𝑾 𝑿 𝒀 ... Tags 󠀁 󠀠 󠀡 󠀢 󠀣 󠀤 󠀥 󠀦 󠀧 󠀨 󠀩 󠀪 󠀫 󠀬 󠀭 󠀮 󠀯 󠀰 󠀱 󠀲 󠀳 󠀴 󠀵 󠀶 󠀷 󠀸 󠀹 󠀺 󠀻 󠀼 󠀽 󠀾 󠀿 󠁀 󠁁 󠁂 󠁃 󠁄 󠁅 󠁆 󠁇 󠁈 󠁉 󠁊 󠁋 󠁌 󠁍 󠁎 󠁏 󠁐 󠁑 󠁒 󠁓 󠁔 󠁕 󠁖 󠁗 󠁘 󠁙 󠁚 󠁛 󠁜 󠁝 󠁞 󠁟 󠁠 󠁡 󠁢 󠁣 󠁤 󠁥 󠁦 󠁧 󠁨 󠁩 󠁪 󠁫 󠁬 󠁭 󠁮 󠁯 󠁰 󠁱 󠁲 󠁳 󠁴 󠁵 󠁶 󠁷 󠁸 󠁹 󠁺 󠁻 󠁼 󠁽 󠁾 󠁿 ```
claunia added the Resolution-Duplicate label 2026-01-31 04:51:12 +00:00
claunia commented 2026-01-31 04:51:13 +00:00
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@j4james commented on GitHub (Nov 13, 2021):

I'm afraid this is a known problem with our handling of narrow characters outside the basic multilingual plane. This will hopefully be fixed one day by #8000. If that issue title is to be believed, some time in the next 48 days. 😉

@j4james commented on GitHub (Nov 13, 2021): I'm afraid this is a known problem with our handling of narrow characters outside the basic multilingual plane. This will hopefully be fixed one day by #8000. If that issue title is to be believed, some time in the next 48 days. 😉
claunia commented 2026-01-31 04:51:13 +00:00
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@zadjii-msft commented on GitHub (Nov 15, 2021):

Yea, I think I'm just gonna close this as part of the umbrella of work that is #8000. Whenever that lands, if this isn't fixed, feel free to ping us here and we can reopen. Thanks!

/dup #8000

@zadjii-msft commented on GitHub (Nov 15, 2021): Yea, I think I'm just gonna close this as part of the umbrella of work that is #8000. Whenever that lands, if this isn't fixed, feel free to ping us here and we can reopen. Thanks! /dup #8000
claunia commented 2026-01-31 04:51:13 +00:00
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@ghost commented on GitHub (Nov 15, 2021):

Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!

@ghost commented on GitHub (Nov 15, 2021): Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!
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Reference: starred/terminal#15880
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